SOUTHKOREA-MARKETS/MIDDAY:South Korea shares rise on chip rebound after AI-led selloff. * KOSPI rises, foreigners net sellers* Korean won strengthens against dollar* South Korea benchmark bond yield risesSEOUL, - Round-up of South Korean financial markets:** South Korean shares rose 1% on Monday as chipmakers rebounded from an AI-driven selloff last week, with investorsshrugging off concerns surrounding Nvidia after assurances that the country's contracted GPU supplies would not be affected.